Path Traversal vulnerability in CSS extension on certain web servers
Priority LOW 39CWE-22Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-22 and the CVSS impact.
Summary
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in Wikimedia Foundation MediaWiki - CSS extension allows Path Traversal.This issue affects MediaWiki - CSS extension: 1.44, 1.43, 1.39.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00441 38th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Wikimedia Foundation | MediaWiki - CSS extension | 1.44; 1.43; 1.39 | — | No fix listed | CNA |
- MediaWiki - CSS extension VendorWikimedia Foundation Affected 1.44; 1.43; 1.39 Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:css_project:css:-:*:*:*:*:mediawiki:*:* | not specified by NVD | Vulnerable | Css Project |
| cpe:2.3:a:mediawiki:mediawiki:1.39.0:-:*:*:*:*:*:* | 1.39.0 | Running on | mediawiki |
| cpe:2.3:a:mediawiki:mediawiki:1.43.0:-:*:*:*:*:*:* | 1.43.0 | Running on | mediawiki |
| cpe:2.3:a:mediawiki:mediawiki:1.44.0:*:*:*:*:*:*:* | 1.44.0 | Running on | mediawiki |
- cpe:2.3:a:css_project:css:-:*:*:*:*:mediawiki:*:* Versions not specified by NVD Vulnerable ·Css Project
- cpe:2.3:a:mediawiki:mediawiki:1.39.0:-:*:*:*:*:*:* Versions 1.39.0 Running on ·mediawiki
- cpe:2.3:a:mediawiki:mediawiki:1.43.0:-:*:*:*:*:*:* Versions 1.43.0 Running on ·mediawiki
- cpe:2.3:a:mediawiki:mediawiki:1.44.0:*:*:*:*:*:*:* Versions 1.44.0 Running on ·mediawiki
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2026-0669
- 2026-10-03 Alias added: GHSA-78qj-mxw5-p7qp
References
More Wikimedia Foundation vulnerabilities
- TI-2025-11006 The compare API module breaks Extension:Lockdown CVSS 4.0CRITICAL 10.0
- TI-2024-32110 Backticks can allow the usage of not-allowed SQL functions CVSS 4.0HIGH 8.8
- TI-2026-65500 Unauthenticated SQL injection in UserPageViewTracker via filterusers and ignoreusers parameters CVSS 3.1HIGH 7.5
- TI-2026-64588 DataTransfer depends on phpspreadsheet version vulnerable to CVE-2026-59933 (XLS/OLE memory exhaustion) CVSS 3.1HIGH 7.5
- TI-2026-42112 SQLi in Cargo extension via year range filter CVSS 4.0MEDIUM 6.9
- TI-2026-42110 Stored XSS through Cargo's map format CVSS 4.0MEDIUM 6.9
Sources
- CVE-2026-0669 · CVE Program
- CVE-2026-0669 · NVD
- FIRST EPSS
- GHSA-78qj-mxw5-p7qp · GitHub Advisory Database · CC BY 4.0
- CVE-2026-0669 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences